EP 2858338 A4 20151209 - ECHO CANCELLATION DEVICE AND METHOD FOR SMALL-SCALE HANDS-FREE VOICE COMMUNICATION SYSTEM
Title (en)
ECHO CANCELLATION DEVICE AND METHOD FOR SMALL-SCALE HANDS-FREE VOICE COMMUNICATION SYSTEM
Title (de)
ECHOUNTERDRÜCKUNGSVORRICHTUNG UND -VERFAHREN FÜR EIN KLEIN DIMENSIONIERTES FREIHÄNDIGES SPRACHKOMMUNIKATIONSSYSTEM
Title (fr)
DISPOSITIF D'ANNULATION D'ÉCHO ET PROCÉDÉ POUR SYSTÈME DE COMMUNICATION VOCALE À MAINS LIBRES À PETITE ÉCHELLE
Publication
Application
Priority
- CN 201210556804 A 20121220
- CN 2013001558 W 20131212
Abstract (en)
[origin: EP2858338A1] The present invention discloses an echo elimination device and method for a miniature hands-free voice communication system. The system comprises a receiver, a primary transmitter and an auxiliary transmitter, a distance from the primary transmitter to the receiver being greater than that from the auxiliary transmitter to the receiver. The device comprises an array echo elimination unit, a self-adaptive echo elimination unit and a residual echo elimination unit, which are structurally cascaded in turn. The array echo elimination unit, with inputs being a signal of the primary transmitter and a signal of the auxiliary transmitter, performs array filtering to obtain one path of output signals; the self-adaptive echo elimination unit, with the input signals being a signal of the receiver, the output signal of the array echo elimination unit and a signal of the auxiliary transmitter, performs self-adaptive filtering to obtain two paths of output signals; the residual echo elimination unit, with the input signals being the two paths of output signals of the self-adaptive echo elimination unit, performs voice probability estimation and echo matching to obtain an echo-eliminated voice signal. Thus, the duplex performance can be enhanced, and the phase consistency of the transmitters is not strictly required.
IPC 8 full level
CPC (source: EP KR US)
H04B 3/20 (2013.01 - EP KR US); H04M 9/082 (2013.01 - EP KR US)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 2014094359A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2858338 A1 20150408; EP 2858338 A4 20151209; EP 2858338 B1 20170823; CN 103051818 A 20130417; CN 103051818 B 20141029; DK 2858338 T3 20171016; JP 2015526045 A 20150907; JP 5844502 B2 20160120; KR 101532531 B1 20150629; KR 20150008508 A 20150122; US 2015172468 A1 20150618; US 9325855 B2 20160426; WO 2014094359 A1 20140626
DOCDB simple family (application)
EP 13864322 A 20131212; CN 201210556804 A 20121220; CN 2013001558 W 20131212; DK 13864322 T 20131212; JP 2015524602 A 20131212; KR 20147037065 A 20131212; US 201314411669 A 20131212